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Images for canterbury earthquakes; more images...

Images, UC QuakeStudies

Members of the New Zealand police shifting a wooden beam from the ruins of the collapsed Canterbury Television Building in the aftermath of the 22 February 2011 earthquake. One of the New Zealand Police members has put on a bicycle helmet as protection. Around them, emergency personnel are searching the rubble for trapped people.

Research papers, University of Canterbury Library

As a result of the Canterbury earthquakes, over 60% of the concrete buildings in the Christchurch Central Business District have been demolished. This experience has highlighted the need to provide guidance on the residual capacity and repairability of earthquake-damaged concrete buildings. Experience from 2010 Chile indicates that it is possible to repair severely damaged concrete elements (see photo at right), although limited testing has been performed on such repaired components. The first phase of this project is focused on the performance of two lightly-reinforced concrete walls that are being repaired and re-tested after damage sustained during previous testing.

Research papers, The University of Auckland Library

The current seismic design practice for reinforced concrete (RC) walls has been drawn into question following the unsatisfactory performance of several RC wall buildings during the Canterbury earthquakes. An overview of current research being undertaken at the University of Auckland into the seismic behaviour of RC walls is presented. The main objectives of this research project are to understand the observed performance of RC walls in Christchurch, quantify the seismic loads on RC walls, and developed improved design procedures for RC walls that will assist in revisions to the New Zealand Concrete Structures Standard. A database summarising the performance of RC wall buildings in the Christchurch CBD was collated to identify damage modes and case-study buildings. A detailed investigation is underway to verify the seismic performance of lightly reinforced concrete walls and initial numerical modeling and small-scale tests are presented in addition to details of planned experimental tests of RC walls. Numerical modelling is being used to understand the potential influence that interactions between walls and other structural elements have on the seismic response of buildings and the loads generated on RC walls. The results from finite element analysis of a severely damaged RC wall in Christchurch highlighted the effect that the floor diaphragms have on the distribution of shear stains in the wall.

Images, UC QuakeStudies

Wheelbarrows belonging to the Student Volunteer Army stacked up outside the UCSA's "Big Top". The tent was erected to provide support for students at the University of Canterbury in the aftermath of the 22 February 2011 earthquake.

Images, UC QuakeStudies

A photograph of the rebuilt Blackwell's Department Store on the corner of Williams Street and Raven Quay in Kaiapoi. The department store was rebuilt after the previous building was damaged in the 2010 and 2011 Canterbury earthquakes.

Research papers, University of Canterbury Library

The term resilience‘’is increasingly being used in a multitude of contexts. Seemingly the latest buzz‘’word, it can mean many things to many people, in many different situations. In a natural hazard context, the terms sustainable planning‘’, and resilience‘planning are now’being used, often interchangeably. This poster provides an overview of resilience and sustainability within a land use planning and natural hazard context, and discusses how they are interrelated in the situation of the earthquake impacted city of Christchurch, New Zealand.

Research papers, University of Canterbury Library

We measure the longer-term effect of a major earthquake on the local economy, using night-time light intensity measured from space, and investigate whether insurance claim payments for damaged residential property affected the local recovery process. We focus on the destructive Canterbury Earthquake Sequence (CES) 2010 -2011 as our case study. Uniquely for this event, more than 95% of residential housing units were covered by insurance, but insurance payments were staggered over 5 years, enabling us to identify their local impact. We find that night-time luminosity can capture the process of recovery and describe the recovery’s determinants. We also find that insurance payments contributed significantly to the process of economic recovery after the earthquake, but delayed payments were less affective and cash settlement of claims were more effective than insurance-managed repairs in contributing to local recovery.

Images, UC QuakeStudies

A photograph of emergency management personnel standing outside the Canterbury Trade Union Centre on Armagh Street. Emergency tape has been draped around the outside of the building and USAR codes have been spray-painted on a column near the entrance. Behind the building are several other earthquake-damaged buildings.

Research papers, University of Canterbury Library

We present ground motion simulations of the Porters Pass (PP) fault in the Canterbury region of New Zealand; a major active source near Christchurch city. The active segment of the PP fault has an inferred length of 82 km and a mostly strike-slip sense of movement. The PP fault slip makes up approximately 10% of the total 37 mm/yr margin-parallel plate motion and also comprises a significant proportion of the total strain budget in regional tectonics. Given that the closest segment of the fault is less than 45 km from Christchurch city, the PP fault is crucial for accurate earthquake hazard assessment for this major population centre. We have employed the hybrid simulation methodology of Graves and Pitarka (2010, 2015), which combines low (f<1 Hz) and high (f>1 Hz) frequencies into a broadband spectrum. We have used validations from three moderate magnitude events (𝑀𝑤4.6 Sept 04, 2010; 𝑀𝑤4.6 Nov 06, 2010; 𝑀𝑤4.9 Apr 29, 2011) to build confidence for the 𝑀𝑤 > 7 PP simulations. Thus far, our simulations include multiple rupture scenarios which test the impacts of hypocentre location and the finite-fault stochastic rupture representation of the source itself. In particular, we have identified the need to use location-specific 1D 𝑉𝑠/𝑉𝑝 models for the high frequency part of the simulations to better match observations.

Images, UC QuakeStudies

A photograph of women sewing felt badges outside the Christchurch City Library in Lyttelton. The felt hearts were a healing outlet during the Canterbury earthquakes. The goal was to create beauty in the midst of chaos, to keep people's hands busy and their minds off the terrifying reality of the earthquakes, as well as to give a gift of love to workers and businesses who helped improve life in Lyttelton.

Images, UC QuakeStudies

A photograph of women sewing felt badges outside the Christchurch City Library in Lyttelton. The felt hearts were a healing outlet during the Canterbury earthquakes. The goal was to create beauty in the midst of chaos, to keep people's hands busy and their minds off the terrifying reality of the earthquakes, as well as to give a gift of love to workers and businesses who helped improve life in Lyttelton.

Images, UC QuakeStudies

Patchwork quilts wrapped around the concrete slabs used to stabilise a broken wall on Winchester Street. They make it look snug despite the snow. Many projects like this have cropped up around Canterbury in an effort to brighten the earthquake environment.